I am so sad for you from this response. You're saying all men do but women don't? And you're buying the lie/excuse that it's different for them and you don't buy my years of observations of my own parents who were completely faithful? If you believe all men do and you just have to be ok with it somehow, it's no wonder you're subjecting yourself to the relationship situation you're in. If you don't believe a man can be faithful, there is no trust and can be no true intimacy in any relationship. That is why this is sad to me.
I personally don't believe there's as much a descrepancy between men & women with sex as it's made out to be. Plenty of women cheat but we're sluts if we do so women hide it, and when caught they have their own excuse. Men: it was just physical; women: they were in need of emotional comfort they didn't get from their relationship. Or whatever the excuse. When I was single, I found men of casual relationships getting attached more than I. I found many turnarounds. I just don't buy that we're so different and I know women who are faithful including myself, and I know my dad - I watched him for years being married and being single. Most people... yeah I buy that. All people? I don't buy it for a minute - in fact I KNOW it is untrue because I have proof... myself.